Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e66a9ead84dab5d0fc60ce1b5a75ff5257a1d8c70cd3c5dec6f769c604a625e9' 
  AND token = 'eca/WmnAl5D06W0w4ilNwHvdvqNVfZdAEVSZsPdwrRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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