Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '81f6b0049736cfcbbbef7afa64ca8671c1984405371828d92cdb7682201bc8e3' 
  AND token = 'vDOUeTP1a0M+3Tq1B1vQSv9KiCCY+UAuFYqLFajyolc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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