SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0c0b07f0f1e5613e8ac7f27b04ae61d3c8b126fbe86378d65d2b0d126fa5ec4' 
  AND token = 'tHpRYvF+B9WK1KKqxuKEw4CPih3NtRGoY63YycOUSzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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