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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd669343c7b9c8a38b1e616741d46ca6bd2d775562de9ce231b40450cc6dfb583' 
  AND token = 'NGEl4i5/kgzaIGo6RjEi/i81iqto2mGVPcZbEOauJbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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