Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa4d53a04c653f553afae0202259583f77ec66955aa01f5e8f46afda61726930' 
  AND token = 'R1j2DKLMt7wRStTSSnUIKB/kMg4/WGOFHrRv9Oa7pXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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