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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '26150d2bec6b1fec5c3b5f6c7b70ee6f0bccfa4acd72e21e64dbe1b079f661a1' 
  AND token = 'Fq8y+GtyAHvE7qtVrBYItfsfgGXne3WeYiq08iKLpls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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