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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32e49c3c8d7cb14826647109737f5467b8e6445acbe349e04f63bf92a18e3484' 
  AND token = 'QD6tOage6Fxfq+I+cuHrDl3CsX5bVM4o0uxiyehyy3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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