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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '50b40745c8e701acb75d049ba15b128dc8d9f18293997aa9f12251f95c423fa3' 
  AND token = 'bT+TtV67S0IgVm7Iga0ou+7zFjNgniESk6gzItv0ZnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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