Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7e5182d5983b8ec3a1f537219bfcfd80e50e7c5987a42af4657dd6dfcb7807bb' 
  AND token = 'YrD9YpkfUEyQAZICdu4TUD7bnAGg1z8r1RaBoDIwvjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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