Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8becbffcdbd18c450a6a33628eeab9f5be0c2fd85090c1781746822c0d42da1' 
  AND token = 'Bq+NOTh6QC7zTXYdQe3pA54hEGFlVBaAsXI91l6a2Rk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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