Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea181c4441d86b385e2da05ce078388c6d21f9c02036594178ae999c060a5d44' 
  AND token = 'R6ChFwsjAijvDgpAsGc1Czeq4/nzPUZrwWe55sOCteY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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