Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efde8987fc8b4e5f2ae9c1dbc29d10e49952b51ae203f44add8ab6c1f936c7d8' 
  AND token = 'tah3FrWpWlUOugPl2Ea9usx62MMu2w0N5k/VrI2izdE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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