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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13aa60b14625d9b2a0c93f1c1ed83aacd2eb047952fbb5e13af7a7c629a5353c' 
  AND token = 'BH7lYzBXEbdzdfrjgGld0g3MnATyRqXkZ1gO7RVORx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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