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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '89e577e5007a9eb684195637bff5eeaac7b7977c83281c72a92ee716a1ebcaee' 
  AND token = 'Qv7lxqYt+n+N1yujdhOMeW7ic20hlg7MUN2QvA8ACNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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