Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9f25e78c8b2461c895ec242b325ff9abc93ee024ace61f8af6681088e407fa2' 
  AND token = '2h14L1HTYSZnAxV36uKg++EQJQ1grCQ1aiy/9wBp20E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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