SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4a86ddfe7abf0adc133b05c307fb48a83ee2dfcf13e9452593584c12f33aa91' 
  AND token = '80+pkGv9waykl5ITU8UtcZZZM/Dh2jJkFhVoCZVxK/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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