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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd74a5943783ae7c8eb4e50e50c603ef8904d95bc3fd6b867fd8d99a31cc8100a' 
  AND token = 'NUPl/nVl54eEyxJRfYmQGJgQbOJSIixpEGHJb73sSa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00088

JSON explain

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