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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '322c27c9b5c8054d233f93dc9f1deafc522c44e917340664482671f90c2ff929' 
  AND token = '7Gl+3iU95X50z1zWpY4Blu9TopOhKPrkbkmgOzI5HC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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