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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5b07bc3aa38186ab3f3f9d936953b73a67100882ae5976cc0fa41bf71c244656' 
  AND token = 'bZ2EG2JkXYooeWAtGLAPH4DzJs93O7fIfeogXJCjKA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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