Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6acee22f88adf6c440045ac068e709857ba5030ecca62304a00e669a63063d84' 
  AND token = '09luWpVnEP+QzapsBktQ0Tt+DKBnNwzPKLoHIacRYVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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