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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9e2399552f56750a30aba90e3baf3982d7b7422b47f9e39bff84ba68e12e5da9' 
  AND token = 'Hj4XBwbPRi4cfPZjLyGjbix+4L7IMT275KhRs6rqy7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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