SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '908659f99b5e6b0e72c168a21a58a34713f314cf67affc4e63457d5af7a5d425' 
  AND token = 'hACNdlyBq34KXfnCP1gYKwY/+AtOblCLxVrJU3CpJ9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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