SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '804d569cf5baa1c8d03798b8fd740502d3a90c4ae6a2ae0824aac002aa0172d7' 
  AND token = 'Zkh+Jb/HjWvDlhI1v7J0cYMGV/R31hICeKsywGUaeEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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