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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4c08928d13ec293ebdfcc07abfbd33f3ed3370a030caa55c8378ab9082e555e5' 
  AND token = 'hwoUn7c3Zwxm9DOo0JSGa+8va2KbJcU1G5DZ6m3F8aM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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