Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b463deee5a262711c5106ca405476bdd7d4992a5f23067705482ba70984049aa' 
  AND token = 'rHLfRMrbyTFS3GnPCWdHVClUD+GToLot/dHJ+7VO/oE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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