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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c6264a11fef2d889c0171dc806b12074d5ef0d809d552d7b74ca344d63da99a' 
  AND token = 'XnbCR0REl1xbTjG5BkyFFRB2AG78iwOiYu3YqC0LS1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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