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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '388857d36e13546c8101f8613dd9dd1565b07d45d605183c6839ee9d652ce754' 
  AND token = 'qG2+4uW8SX+f9q9eW77sKcBVDgJG0OmK1MylUC1OseI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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