Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90abb1ceec9a3625c26b63a161fae2341166d737bdf926146b96ea290c5a8859' 
  AND token = 'veQ/U86U9hESE8ySHbAYH6HpwiNkAVwXjs+fASEJ3zQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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