Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1b0aeffacf338bb04003b332fe515960456954ece6cb4bf6230896b3011dd0c' 
  AND token = '6EuRyLNf+cAl2B1/LKjHPf1pwDDzhFaokwGALq4ZuF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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