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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0ada955697efe00ee75ca7f16adf5158981148b29694db2f968bc170cdb43f8f' 
  AND token = 'VdG0HuhJZ5QI7Ak898L5JerCjciik4naELjhYlird2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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