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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04593c870993b4942f1551958d90559030c2f0c5590a9d133cb97099c50cec8e' 
  AND token = 'cKxpTmGxk9KDeGhP6MrvsF46ujR2gSF325Anmysc0VM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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