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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e70ecece355391a835f9694dff307abb7b0c22b5cf6388eb818d8e32c8f26646' 
  AND token = '9eWq5SnGR24yH9Ji5yEhRy3Ie4rXd2QRJhtEa21QHcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}