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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b28dbff99d486ea3ed5e40fca6655d6bbba0bf2cb1235bceb677745aa4afba82' 
  AND token = '8OFyI6/Ji7IaZ3Ydqv8iyEc44h9ORC1Riq6C/Gb7taw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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