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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61589edf2dc5cb5ab06fd83ef80c9cbf272d5ff92a793d5c341d27b796ca5267' 
  AND token = 'K9hRaDeRbefQRUXf9St2xk30YUIHtL7R9pZG/ukLas8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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