Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b9ae1b3ca47b4e1f06e2426bdeab6e4111158e027c06f872e4d33e0b6ed9102c' 
  AND token = 'J1e9JBp+Tc4DhPIM6GIDpNkkaA0KvAU04bKtSB/67io=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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