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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1053c95902888dbe43ef97b5c94379698332e1ff57168f7411c5b4fe1eef15b' 
  AND token = 'HJi0ilQhaUN7OsafoC8q7q8JIUCXYdm2ACI9KINtPwQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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