SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44896afec5e8b0e7419c4b5f713fbe7dae0d9f6b92534c7910dddab56658b732' 
  AND token = 'EVPjDuyBlP+QPm2kcDwz1mFdImGGgZGowhljjzZum1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}