SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e0a1f0e1609b1b4285670bd5a392d07bf9db508d64729f4a2779f0c8e11167c' 
  AND token = 'H8vAd+vBl7SpUE9J/yAQTpdpLZhZiKPGjALFmpkhGyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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