Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e0b1e55f003bfba393d2836639102df38b44a75a1546af5eb983f0f06b3ff4b9' 
  AND token = 'vi0a0M0GD3ptd1/5rSZ7C1LnHH+8DGWyJvP/OL3eeww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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