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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58195c630bcd0d4e76c7fe7ea59b65f97c06981cf123895ff7ddbb1a7eb2b7fe' 
  AND token = 'luJOd9vXVUQ9vPs0GhTQCHCRgAmpMu3fV1zuBAMvbBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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