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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '009e69693d27fb7d94ada18822dd11ed146fa92a3518a11e0c81b253620c3152' 
  AND token = 'iFfGNtRfp7YoDSGRjP0Md7KfyWJg14o5o1bnQ/ksBaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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