SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fbb89341b983a500a70a88ac7599246a7ff3685f246735943696e06b0c92cd41' 
  AND token = 'JnQksAju9pmHlJj2v9G4WKkuYvqWFsLpJpTzxoAlzQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}