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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ad1c2544f14851883a037c5a4a4af1c100511587b2b5a477fe43ff6aad8ec03' 
  AND token = 'IISCq9WnJ5Einc7Y7kzNL/CzuX1aojctNnxT9DZSJBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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