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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e11014b4c86af94831af47cea8efd0c7d8d34c4200ddc9c60ea3a444e01c050b' 
  AND token = 'FXCw+q8tpNdmq5GmgLFr4nmZRqN1QCNmB2M9ThyYn4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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