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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2412badc32e43310ddc9962a0bd197c00eab405617ecf39c577c154e34e2b2aa' 
  AND token = 'IriuOzC6G9hn5y+L0+7aLupN0YAmu3Y/gpWQSX+68Gk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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