Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1f0e1c5f5020ef3c3e416e4f467dfa9974a1794530f03f598cfe620e26bf1a2' 
  AND token = 'IrzM2EkiKsVioCp8SiqbSoLyejcoeRLChEn4ZyZuXbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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