Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '206d0c9e720052e5a05ac603e6d0982ef51e669801847f3ca835c53435c62ceb' 
  AND token = 'sRxsFc1rjEzcUH0O/md0rkfQb5JwQnmRg6i9TaRXwHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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