SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ed4b4de7717c45b66fe185603f472ebe77aa4d845266a84c10dcc392c2361978' 
  AND token = 'JtZ4+Lp/feY91qtdU3F0S3PpMswr8ggxqYrlo5MvcDI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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