SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dd9a76495bb7889c9c3630d6db8aab6c58058633aafa51e4db575ba2bcedf93' 
  AND token = 'wG4BjuQufu2Cr2xgrJEkVsuwLp6ZKW3Mgno5t/XzRXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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