Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45c4886ebde6c529245849bbf4919012f20bd32177148053a94282314aaae557' 
  AND token = '54ATdy2R9xuv2qthiCvI3nq09Ng4vXpPLL2mfCW+x5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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