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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '517c31748a6f59a9d5eda431a1c8e4ae04ff92674cc0b514d081177baacd148c' 
  AND token = '0E2ay613wiOilnztqNC8NG7eM47KbpsK2jH7r7BiedA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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