SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7867d6c1ea2322126782df9a7800c1f9c996551e0c1b02c8249c4becffa3de65' 
  AND token = '4eKWFIj3jy0gN9g0mBrjOmqXevZgw2DiEB4pS/ly/GY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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