Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '350e40eb5d0eaacc462b3cd775d45efc0757ebb1f8bdb41b50902e70d87cfba1' 
  AND token = 'W4nQYhr1hD1C2uoaelm/W8hcmvvlE1tKiWmxCuwgY/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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