Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a3b881f2ef0e2a62c63b22a4c22049b051977ad027cdc14b961ae753e4c98961' 
  AND token = 'vNgCky6rmnOjRTpleKxBELZRzmPg9aSTY0tpi7NTwhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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