Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a2159087710f9509485ec23bf2acf22ab59bacc81dc105697e0953e264e4c3a5' 
  AND token = '1U2vH2+V5JmQ1+qw5Brr2wXImeJtqK8Si3o4W2xPh6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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