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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9d736db5476bc2d4e154c03153c41ade4f5575a6a81c0e0ceda50d3a31e7ce9e' 
  AND token = 'cCboaM6OnFdHnzZaXRba4o1ANrYIYvQasyw058woCZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00146

JSON explain

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