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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'bf417a22d80c637db487fadc69f34c562a5dd851b791c53e9e4c14b99466f721' 
  AND token = 'lrjN0pzU51KnVk0q4+WKHBnCBiSraqt5sB6SSedDiLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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