SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2223871a776b2fa94c5a41afe1091f6363b1276f1a078cbb20612274c795da0e' 
  AND token = 'LI+QIPFHZwCnWynKrKq+tVplyPG2xUSVx4b7spoJHiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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