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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85f4650e0b7df13094c56ceb3a5c845b7914ecada8707f79fec851b6afa6c2d3' 
  AND token = 'Hbi3LWe1VEI3kvG0SApaodLoASLJFNgEFdMBUxS1qjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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