Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7ceef5cd7b793ee2b0c9112381d662632f5bdb60b65becc323c871ed0dec039' 
  AND token = 'y3J2NDUnonLj22GmSVL8NJpb41C6QtrPXsuBDmKzdE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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