SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01df2bfc868f14a1940167526ae7bf44b2e85311a2130d52b5065538b8e8d351' 
  AND token = 'W2eTV49Lg/IKxJsuY4FFTRMnf2zl/GS4I05zW3zx9Ks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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